Friday
November 28, 2014

Posts by SARA


Total # Posts: 3,795

Physics
A roller-coaster car with a mass of 650 kg starts at rest from a point 28 m above the ground. At point B, it is 14 m above the ground. [Express your answers in kilojoules (kJ).] (a) What is the initial potential energy of the car? 1 . kJ (b) What is the potential energy at ...
March 5, 2012

Algebra
in put y=x(10)
March 5, 2012

Math
The coordinates of the vertices of CDE are C(1, 4), D(3, 6), and E(7, 4). If the triangle is reflected over the line y = 3, what are the coordinates of the image of D? (3, –6) (3, –3) (3, 0) (3, 9)
February 28, 2012

Geometry
b.20 because 1:3:5 1+3+5=9 180/9=20 20:60:100
February 28, 2012

1 geometry question
The coordinates of the vertices of CDE are C(1, 4), D(3, 6), and E(7, 4). If the triangle is reflected over the line y = 3, what are the coordinates of the image of D? (3, –6) (3, –3) (3, 0) (3, 9) i have no clue
February 28, 2012

Finance
Which of the following has more interest risk? Why? A. Bond A with a 10% Coupon and a YTM of 10% which matures in 5 years. B. Bond B with a 10% Coupon and a YTM of 10% which matures in 11 years. C.) A share of Preferred Stock that pays $10 dividend in perpetuity with a ...
February 28, 2012

Finance
A proposed project has expected cash flows of $72,000 per year for 5 years. If the project has an initial cost of $400,000, what is the payback period (in years)?
February 28, 2012

Finance
You recently paid $31.50 for a share of Breaking Benjamin stock. Your required rate of return is 13% and you expect the company to increase dividends at a constant rate or 2.5% for the forseeable future. What was the most recent dividend of Breaking Benjamin?
February 28, 2012

calculus
A 29-ft chain with mass density 3 lb/ft is initially coiled on the ground. How much work is performed in lifting the chain so that it is fully extended (and one end touches the ground).
February 24, 2012

chemistry
How many molecules in 8.221g PbO2?
February 23, 2012

geometry
find the altitude of an equilateral triangle with side length twelve
February 23, 2012

geometry
the base of an isoscels triangle is 4x long. the altitude to the base is 3x cm long. Find the length of one other side of the triangle
February 23, 2012

physics--please help
When only the front wheels of an automobile are on a platform scale, the scale balances at 7.8 kN; when only the rear wheels are on the scale, it balances at 5.5 kN. What is the weight of the automobile? How far is its center of mass behind the front axle? (The distance ...
February 23, 2012

physics
When only the front wheels of an automobile are on a platform scale, the scale balances at 7.8 kN; when only the rear wheels are on the scale, it balances at 5.5 kN. What is the weight of the automobile? How far is its center of mass behind the front axle? The distance between...
February 22, 2012

calculus
find lim x->0 3- sqrt x+9/-x
February 19, 2012

world history
thank you
February 19, 2012

world history
i need a website that proves that because i have to do a bibliography for this section of the senior project
February 19, 2012

world history
training like a student teacher something like that isn't that consider as a training
February 19, 2012

world history
i'm working on my senior project and i need some help i'm supposed to do some researches about my future career, however i couldn't find a website that tells me if a world history teacher needs an additional training or not ?
February 19, 2012

math Statistics
Hi I need help with Statistics. Can anyone help me to understand it better? I am in fear that if I do not figure this out soon I will fail my class. I am needing help with the chapters 12,and 13. in the book called Statistical Reasoning in the Behavioral Sciences, 6th edition...
February 19, 2012

physics--please help
Only need help with part c--answer for part a is 2.94 radians and for b it is 777 days Mars orbits the Sun at a mean distance of 228 million km, in a period of 687 days. The Earth orbits at a mean distance of 149.6 million km in a period of 365.26 days. All answers should be ...
February 18, 2012

physics
Only need help with part c Mars orbits the Sun at a mean distance of 228 million km, in a period of 687 days. The Earth orbits at a mean distance of 149.6 million km in a period of 365.26 days. All answers should be in the range (0, 2pi) a) Suppose Earth and Mars are ...
February 17, 2012

Government
Cross pressured v?
February 17, 2012

last Government
These voters are caught between conflicting issues. young voters independent voters strong party voters cross-pressured voters
February 17, 2012

Government
When party loyalists select the candidates of their party, they vote a propaganda ticket. straight-party ticket. cross-pressured vote. landslide.
February 17, 2012

Physics to drwl please help
Only need help with part c Mars orbits the Sun at a mean distance of 228 million km, in a period of 687 days. The Earth orbits at a mean distance of 149.6 million km in a period of 365.26 days. All answers should be in the range (0, 2pi) a) Suppose Earth and Mars are ...
February 16, 2012

Math
18th
February 16, 2012

physics
I need only part c Mars orbits the Sun at a mean distance of 228 million km, in a period of 687 days. The Earth orbits at a mean distance of 149.6 million km in a period of 365.26 days. All answers should be in the range (0, 2pi) a) Suppose Earth and Mars are positioned such ...
February 16, 2012

physics
I need only part c Mars orbits the Sun at a mean distance of 228 million km, in a period of 687 days. The Earth orbits at a mean distance of 149.6 million km in a period of 365.26 days. All answers should be in the range (0, 2pi) a) Suppose Earth and Mars are positioned such ...
February 16, 2012

physics
thanks
February 15, 2012

physics
not the right answer
February 15, 2012

physics
A particle is moving clockwise in a circle of radius 1.54 m. At a certain instant, the magnitude of its acceleration is a = 26.0 m/s2,and the acceleration vector has an angle of θ = 50° with the position vector, as shown in the figure. At this instant, find the speed...
February 15, 2012

physics
Assume that the Earth is spherical and recall that latitudes range from 0° at the Equator to 90° N at the North Pole. Consider Dubuque, Iowa (42.50° N latitude), and Guatemala City (14.62° N latitude). The two cities lie on approximately the same longitude. Do ...
February 15, 2012

physical science
5/17=0.294 N
February 15, 2012

physics
it is d
February 15, 2012

physics
for L, are you using the answer from part a?? when i use that i get around 14 degrees
February 15, 2012

physics
Assume that the Earth is spherical and recall that latitudes range from 0° at the Equator to 90° N at the North Pole. Consider Dubuque, Iowa (42.50° N latitude), and Guatemala City (14.62° N latitude). The two cities lie on approximately the same longitude. Do ...
February 15, 2012

English 5 questions
1. During this time period, writers sought to capture the _____________ of the American people during this era of a new postwar economy and society. peace anger anxiety all of the above 2. Like the modernists, postmodern writers focused on _____________ experience and ...
February 15, 2012

physics
thanks
February 15, 2012

physics
A man with a mass of 50 kg stands up in a 66-kg canoe of length 4.0 m floating on water. He walks from a point 0.75 m from the back of the canoe to a point 0.75 m from the front of the canoe. Assume negligible friction between the canoe and the water. How far does the canoe ...
February 15, 2012

1 chem question
A base has a Kb of 2.5 x 10–11. Which of the following statements is true? This is a concentrated base. This base ionizes slightly in aqueous solution. This is a strong base. An aqueous solution of this base would be acidic. (do explain. i dont understand this one)
February 14, 2012

physics
A man with a mass of 52 kg stands up in a 66-kg canoe of length 4.0 m floating on water. He walks from a point 0.75 m from the back of the canoe to a point 0.75 m from the front of the canoe. Assume negligible friction between the canoe and the water. How far does the canoe ...
February 14, 2012

Physics
Pepper pulls a 20.0 kg object along the floor accelerating at 2 m/s/s, and μ = .2. How much work has he done while pulling the string 5.0 m? If it takes her 1.0 seconds, how much power has she used? If 1.0 kcal = 4184 J, and an Oreo has 50 kcal, how many Oreos did Pepper ...
February 14, 2012

Physics
Pepper pulls a 20.0 kg object along the floor accelerating at 2 m/s/s, and μ = .2. How much work has he done while pulling the string 5.0 m? If it takes her 1.0 seconds, how much power has she used? If 1.0 kcal = 4184 J, and an Oreo has 50 kcal, how many Oreos did Pepper ...
February 13, 2012

Chem
Which of these solutions is the most basic? [H+] = 1 x 10–2 M [OH–] = 1 x 10–4 M [H+] = 1 x 10–11 M [OH–] = 1 x 10–13M i think its the first one?
February 13, 2012

Chemistry
I just wanted to say i found this question and if helped me so much with my homework! thank you so much DrBob222!!
February 13, 2012

Algebra
Find the square roots of 25
February 11, 2012

Chem
Which of the following statements is part of the kinetic theory? The particles of a gas move independently of each other. The particles in a gas move rapidly. The particles in a gas are relatively far apart. all of the above
February 10, 2012

physics
convert 52 g to kg and then 218 divided by that number
February 10, 2012

physics
I did that but i am not getting the right answer
February 10, 2012

physics
Betty Bodycheck (mB = 50.2 kg, vB = 22.0 km/h in the positive x-direction) and Sally Slasher (mS = 45.2 kg, vS = 28.0 km/h in the positive y-direction) are both racing to get to a hockey puck. Immediately after the collision, Betty is heading in a direction that is 76.0° ...
February 10, 2012

physics
The question is what are their final kinetic energy?
February 10, 2012

physics
Betty Bodycheck (mB = 50 kg, vB = 22.0 km/h in the positive x-direction) and Sally Slasher (mS = 45.2 kg, vS = 28.0 km/h in the positive y-direction) are both racing to get to a hockey puck. Immediately after the collision, Betty is heading in a direction that is 76.0° ...
February 10, 2012

physics
This means that for every action, there is an equal and opposite reaction
February 10, 2012

math
454.86
February 9, 2012

physics
A billiard ball of mass 0.16 kg has a speed of 1.80 m/s and collides with the side of the billiard table at an angle of 34.6°. For this collision, the coefficient of restitution is 0.841. What is the angle relative to the side (in degrees) at which the ball moves away from...
February 9, 2012

Psychology
As a consumer of mental health services, which type of therapy would you prefer if you did not like to talk about your problems? If you were suffering from a phobia? If you had recurring nightmares since childhood? If you wanted to improve your marriage?
February 9, 2012

trig
if diameter of the circle is 100 cm. and length of the arc forming the angle is 360 cm. Assume that the earth is a perfect sphere of diameter 8000 miles. Find the distance between: Rome, Italy: latitude 42 degrees north Copenhagen, Denmark: latitude 54.3 degrees north
February 8, 2012

Geometry
What is the measures of the angles of a triangle that are in the extended ratio 2:2:8. What is the measure of the smallest angle?
February 8, 2012

poetry
what is the genre of the poem: tonight i can write by pablo neruda?
February 6, 2012

English
faith that he will one day be affirmed by white America. ???
February 6, 2012

English
The speaker in “I, Too, Sing America” survives adversity because he feels faith that he will one day be affirmed by white America. he has uncovered the hypocrisy around him. he is better than the people who are oppressing him. hope that he can one day run away from ...
February 6, 2012

English
F. Scott Fitzgerald dropped out of college to ..... begin writing. get married. join the army. work for his father.
February 5, 2012

chemistry
A 40-year old man, at a prominent legal firm experiences abdominal pain post lunch. He takes several trips to the restroom, but continues to experience pain and cramps. He decides to go to the doctor and admits he consumed 2 bottles of beer @ lunch. The alcohol content (...
February 5, 2012

English
Why don’t the narrator and the other man want to hold Edward for ransom? Is their motivation internal or external? in " Why, You Reckon?"
February 4, 2012

calculus
Solve for x: 2x=ex+1
February 2, 2012

calculus
Put the function P=40(39)t in the form P0e^kt. When written in this form, you have: k= ? P0= ?
January 31, 2012

calculus
I don't know if I'm typing it in wrong into my graphing calculator but I need to estimate the limits of sin(8 theta) / theta
January 31, 2012

biochemistry
If you make up a solution of 100 mL of 0.1 M HEPES in the basic form, what will be the pH? I have no idea where to even start...
January 30, 2012

psy/300
What are the positive aspects of peer groups during adolescence? Which of Erikson's stages describes the psychological issues of adolescence.
January 28, 2012

chemistry
thank you
January 26, 2012

chemistry
Freshman in clooege decides to try her hand at pickling olives. According to the recipe, she needs to add 3 tsps. of salt to 1 cup diced olives. She erroneously adds 6 tsps instead. Each tsp weighs about 5g and contains 2300 mg of sodium. Determine the amount of sodium added ...
January 26, 2012

Physics
On a safari, a team of naturalists sets out toward a research station located 7.0 km away in a direction 42° north of east. After traveling in a straight line for 3.1 km, they stop and discover that they have been traveling 20° north of east, because their guide ...
January 23, 2012

calculus
Thanks Steve, I didn't know how to use this function on the calculator.
January 23, 2012

calculus
calculate y = log_10(x) where x = 0.3
January 23, 2012

chemistry
Thanks, That's it!
January 23, 2012

chemistry
that is very true. What I was asking involves something like this as an example: 30mg/kg*1000g / 1kg* 1g /1000mg 30-/kg* 1000-/1-* 1g/1000- 30 * 1000/1000 * 1g = 30g
January 23, 2012

chemistry
Tell me what you think: I wrote #kg = 297mg / 3.5 mg/kg the mg's would eliminate each other and you are left with 297 / 3.5 kg = 85 kg.
January 23, 2012

chemistry
The physician has prescribed a medication of 3.5 mg/kg of body weight. If you give 297 mg of medication what is body weight of patient in kg? Is there a converstion formula?
January 23, 2012

Chemistry
I'm sorry, let me re ask this question and tell you what I've come up with ( I work 11pm-7am and do not sleep in daylight hours) Given 30mg/kg and need grams per dose with dosage every twelve hours. Here's what I've attempted: need to change mg/kg to grams --&...
January 20, 2012

Chemistry
The question just gives me the dosage of 30 m/kg for every twelve hours and asks what the dosage would be in grams.
January 20, 2012

Chemistry
I need the equation for determining how to decide : You are given a dosage of 30m/kg to be given every twelve hours, how much is given (in grams) with each dose. I know the answer is obviously 15 m/kg but what is it in grams?
January 20, 2012

algebra
amanda weighs 3/4 as much as er ister. if amanda weighs 129 how musch does her sister weigh? how do you write the equation with x being the sisters weight.
January 19, 2012

Math
The vertices of an isosceles triangle are A(3, 6), B(7, 2), and C(4, 3). What is the equation of the triangle's line of symmetry? y= x+1 y= x-1 y= x y = -x+1
January 18, 2012

math
a rectangular swimming pool is 15 yds x 25 yds. the bottom of the pool needs to be repainted. if it costs $4.25 per square foot to paint the pool, give the cost to repaint the bottom of the pool.
January 17, 2012

Statistics-Confidence Interval
Can someone please help me on how to work this out?? I'm so super confused. Thanks! A professor at Kaplan University claims that the average age of all Kaplan students is 36 years old. Use a 95% confidence interval to test the professor's claim. Is the professor's ...
January 16, 2012

Chemistry
What is the net ionic equation for this reaction? 2MnO4 (aq) + 5H2C2O4 (aq) + 6H(aq)----->10CO2 (g) + 2Mn(aq) + 8H2O(l)
January 16, 2012

statistics
Facebook reports that the average number of Facebook friends worldwide is 175.5 with a standard deviation of 90.57. If you were to take a sample of 25 students, what is the probability that the mean number Facebook friends in the sample will be 190 friends or more?
January 15, 2012

precalculus
thank you my precalculus is now done - chemistry is next- can't wait!!
January 15, 2012

precalculus
given functions f,g, and h find f o g o h state exact domain. show work f(x)=1/x g(x)=lnx h(x)=2x+15
January 15, 2012

precalculus
these are hard to do - thank you
January 15, 2012

precalculus
verify the functions are inverses of each other by showing that f(g(x)) =x show work. f(x)=6/1-x g(x)= 1- 6/x
January 15, 2012

precalculus
I'm going to do this on my own, but I would like to check mine against yours - give me today to work on it and I will be able to compare. List all possible rational zeros for the polynomial find all real zeros and factor completely. show work f(x)=3x^4-29x^3+89x^2-75x-36 ...
January 15, 2012

precalculus
x/4x+1 < 5x/6 solve the inequality answer in interval notation and show work - thanks
January 15, 2012

precalculus
Thanks Reiny - you have rescued me again
January 15, 2012

precalculus
solve logarithmic equation in exact form only. show work. log_5(x-3)+ log_5(x-6)-log_5(x+1)=2
January 15, 2012

precalculus
thanks again
January 15, 2012

precalculus
solve exponential equation. express in exact form. e^x-42e^-x= -19
January 15, 2012

precalculus
solve the inequality please x^4-6561>0 So far I have come up with x^4>9^4. I guess what's throwing me is the answer has to be in interval notation and for the life of me, I can't remember what that is! (for me, it used to be a blond moment - now I'm gray with...
January 14, 2012

precalculus
find the inverse of function f(x)=4-2ln(x+1). state domain, range and any asymptotes of both
January 14, 2012

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